CVE-2021-39249

medium

Description

Invision Community (aka IPS Community Suite or IP-Board) before 4.6.5.1 allows reflected XSS because the filenames of uploaded files become predictable through a brute-force attack against the PHP mt_rand function.

References

https://ssd-disclosure.com/ssd-advisory-ip-board-stored-xss-to-rce-chain/

https://invisioncommunity.com/release-notes/4651-r102/

Details

Source: Mitre, NVD

Published: 2021-08-17

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.1

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N